public class ClassRoom implements Runnable {
	Thread  student,teacher;
	ClassRoom() {
		teacher=new Thread(this); 
		student=new Thread(this); 
		teacher.setName("王教授");
		student.setName("张三");
	} 
	public void run(){     
		if(Thread.currentThread()==student) {
			try{  System.out.println(student.getName()+"正在睡觉，不听课");
				Thread.sleep(1000*60*60);
			}
			catch(InterruptedException e) {
				System.out.println(student.getName()+"被老师叫醒了");
			}
			System.out.println(student.getName()+"开始听课");
		}
		else if(Thread.currentThread()==teacher)  {
			for(int i=1;i<=3;i++) {
				System.out.println("上课!");
				try{ Thread.sleep(500);
				}
				catch(InterruptedException e){} 
			}
			student.interrupt();           //吵醒student
		}
	}
}
